World End Economica is a visual novel, plain and simple. As a visual novel of the "Kinetic" variety, there are no decisions to make or actions to take; it is more accurate to think of WEE as a book rather than a game. It could take a fast reader at least ~8 hours to get through it all.
Though the novel is appropriate for younger audiences, there are economic concepts which may be more suitable for those in the young adult range. All in all, it is a novel appropriate for a wide range of ages, and I would recommend it for anyone who wants some light sci-fi to pass the time.
The strength of the novel lies in being both simple and complex when it needs to be. With a small cast of characters involved, it's easy to keep track of them all, and all characters feel like they're a significant part of the story. This might not be a story with spells or lasers, but the author certainly does not dissapoint when it comes to assigning high stakes. Explaining further may ruin parts of the story, but allow this reviewer to at least say this: anyone who reads this to the end will be begging for the next episodes (which are currently being translated).
A few Engrish errors happen on a rare occasion, but not enough to ruin the story. Whether you be a new reader curious of what Visual Novels are all about, or for an avid reader looking for some light reading, WEE is an enjoyable experience for many.
One concern: as is the case with nearly all visual novels, this book isn't for anyone who doesn't like anime-esque visuals, and much older audiences may have trouble enjoying this book. Other than that, it's a good ~10 hours of well written sci-fi/economics that makes one yearn for more.